# tmux.WindowFilter.Predicate

- **Module:** tmux.WindowFilter
- **Package:** github.com/libtmux/libtmux-go/tmux
- **Language:** Go
- **Kind:** method
- **Source:** https://github.com/libtmux/libtmux-go/blob/5f808882015a975a65acc7f9da5b3ff0d5cbdc91/tmux/filter_generated.go#L2720
- **Page:** https://libtmux.org/reference/go/tmux-windowfilter-predicate/

```
tmux.WindowFilter.Predicate() -> (func(*Window) bool, error)
```

Predicate validates the window filter and returns a local predicate for [Window] values materialized by a [Snapshot]; it never runs tmux. It traverses only loaded relations and returns false for a nil candidate.